Synthesis, X-ray structure, thermal and magnetic behavior of [(bipy) 2Ni2(μ-Cl)2Cl2(H 2O)2]: The first neutral ferromagnetically coupled six-coordinate dichlorido-bridged nickel(II) dimer

Oluwatayo F. Ikotun; Wayne Ouellette; Francesc Lloret; Miguel Julve; Robert P. Doyle

doi:10.1002/ejic.200700179

Synthesis, X-ray structure, thermal and magnetic behavior of [(bipy) ₂Ni₂(μ-Cl)₂Cl₂(H ₂O)₂]: The first neutral ferromagnetically coupled six-coordinate dichlorido-bridged nickel(II) dimer

Oluwatayo F. Ikotun, Wayne Ouellette, Francesc Lloret, Miguel Julve, Robert P. Doyle

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

NiCl₂·6H₂O and 2,2′-bipyridine (bipy) (1:1) were allowed to react under ambient conditions in dimethyl sulfoxide in the presence of acetylacetone (Hacac). The resulting green solution was concentrated in vacuo, and a green solid was isolated by precipitation with cold acetone. X-ray guality crystals of [(bipy)₂Ni₂(μ-Cl) ₂(Cl)₂(H₂O)₂] (1) were grown by subsequent vapor/liquid diffusion of acetonitrile into a methanolic solution for one week. The structure of 1 consists of a dimeric nickel system with each metal atom in an octahedral geometry. Both equatorial bridging and axial chlorine atoms are present in this neutral species. The nickel-nickel distance (3.441 Å) is the shortest reported to date for this class of complexes and the bridging chlorido angles at 91.5° are the most acute. Variable-temperature magnetic susceptibility measurements reveal the complex to have the strongest ferromagnetic interaction reported to date (J = +16.8 cm ^-1, the Hamiltonian being defined as H = -JS_A· S_B) for this family of complexes.

Original language	English (US)
Pages (from-to)	2083-2088
Number of pages	6
Journal	European Journal of Inorganic Chemistry
Issue number	14
DOIs	https://doi.org/10.1002/ejic.200700179
State	Published - 2007

Keywords

Crystal structures
Ferromagnetic coupling
Nickel complexes
Thermal analysis

ASJC Scopus subject areas

Inorganic Chemistry

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10.1002/ejic.200700179

Cite this

Synthesis, X-ray structure, thermal and magnetic behavior of [(bipy) ₂Ni₂(μ-Cl)₂Cl₂(H ₂O)₂]: The first neutral ferromagnetically coupled six-coordinate dichlorido-bridged nickel(II) dimer. / Ikotun, Oluwatayo F.; Ouellette, Wayne; Lloret, Francesc et al.
In: European Journal of Inorganic Chemistry, No. 14, 2007, p. 2083-2088.

Research output: Contribution to journal › Article › peer-review

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abstract = "NiCl2·6H2O and 2,2′-bipyridine (bipy) (1:1) were allowed to react under ambient conditions in dimethyl sulfoxide in the presence of acetylacetone (Hacac). The resulting green solution was concentrated in vacuo, and a green solid was isolated by precipitation with cold acetone. X-ray guality crystals of [(bipy)2Ni2(μ-Cl) 2(Cl)2(H2O)2] (1) were grown by subsequent vapor/liquid diffusion of acetonitrile into a methanolic solution for one week. The structure of 1 consists of a dimeric nickel system with each metal atom in an octahedral geometry. Both equatorial bridging and axial chlorine atoms are present in this neutral species. The nickel-nickel distance (3.441 {\AA}) is the shortest reported to date for this class of complexes and the bridging chlorido angles at 91.5° are the most acute. Variable-temperature magnetic susceptibility measurements reveal the complex to have the strongest ferromagnetic interaction reported to date (J = +16.8 cm -1, the Hamiltonian being defined as H = -JSA· SB) for this family of complexes.",

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